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rusak2 [61]
3 years ago
7

4. Which of these best explains the organization of the biosphere?

Biology
1 answer:
nasty-shy [4]3 years ago
8 0

Answer:

the answer is A.groups of biomesmake up a community, andand groups of populations make up a biome.

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The four principal types of stress are __________.
stealth61 [152]

Answer:

A

Explanation:

frustration, conflict, pressure, and anxiety

7 0
3 years ago
providing examples explain how sexual reproduction in plants has evolved to become less dependent on water
Mars2501 [29]

The Gymnosperms and Angiosperms are groups of plants with seed, which means that they don’ t necessary acquire water for fertilization. These groups have made adaptations for sexual reproduction on dry land.

1) Gymnosperms (plants with the seeds are not enclosed in an ovary) have developed over the course of its evolution, structures that solved the main limitations present in the Pteridophytes in relation to sexual reproduction, in the terrestrial environment. The main changes that happened as an evolutionary adaptation to dry land are those on the seeds and pollen. The advantages of the seeds are: the storage tissue which sustains growth and a protective coat of the seeds. Seed is enveloped with the layers of hardened tissue which prevents desiccation. This is what frees reproduction from the need for a constant supply of water. <span>The sperm (male gamete) of gymnosperms</span> is enclosed in a pollen grain. Thi structure is protected from desiccation and can reach the female organs without dependence on water. Gymnosperms also developed structures called cupules to enclose and protect the ovule (the female gametophyte) which will develop into a seed upon fertilization.

 

2) Angiosperms are a group of plants which protect their seeds within an ovary called a fruit. Angiosperms have special evolutionary adaptations. For example, they produce their gametes in separate organs, usually in a flower, so the fertilization and embryo development takes place inside an anatomical structure. That provides a stable system of sexual reproduction largely sheltered from environmental fluctuations like water need.

7 0
3 years ago
Read 2 more answers
NEED HELP ASAP !!!!!!!!!!!!!!
Lesechka [4]

Answer:

C

Explanation:

because there is not enough surface area to grow more

7 0
2 years ago
A botanist scrapes pollen off a flower of one plant and then uses it to pollinate the flower of another plant. What can be scien
Ray Of Light [21]

Answer:

<em>They will have a large number of genetic variations.</em>

Explanation:

Genetic variations arise due to sexual reproduction or due to the process of meiosis.  

Cross-pollination can be described as a process in which the pollen of one flower is transferred to another flower. The pollen when fertilizes the egg in the stigma, will produce offspring with varied genetic characteristics. This will be because the pollen would carry the trait of another flower and the egg of another flower. This will lead to many genetic variations.

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2 years ago
What is smooth er anaolgy to a museum?
vlabodo [156]
In the cell, the function of the smooth endoplasmic reticulum is that it produce lipids, which are fats and oils. They also transport materials..
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